Sanitize FileName string

For security reasons, the FileName string must be sanitized.
Resolves openbmc/openbmc#1331

Change-Id: I90aeda32421caf16e6919cffb71dd0450e4cf868
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/download_manager.hpp b/download_manager.hpp
index b78dc4b..2ee03fb 100644
--- a/download_manager.hpp
+++ b/download_manager.hpp
@@ -36,8 +36,8 @@
          * @param[in] fileName      - The name of the file to transfer.
          * @param[in] serverAddress - The TFTP Server IP Address.
          **/
-        void downloadViaTFTP(const std::string fileName,
-                             const std::string serverAddress) override;
+        void downloadViaTFTP(std::string fileName,
+                             std::string serverAddress) override;
 };
 
 } // namespace manager